1 从消息内容里面点击到需求详情的，能返回消息页面。

2 消息列表页有图片信息显示 [图片]

pages/msgModule/index.wxml

                 </view>
                 <view class="msg-content fl">
                     <view class="msg-nickName fl yichu">{{ item.businessCommunicationCustomerVO.nickName }}</view>
-                    <view class="msg-last-content fl yichu">{{ item.lastContent }}</view>
+                    <view class="msg-last-content fl yichu" wx:if="{{ item.messageType == 2 }}">[图片]</view>
+                    <view class="msg-last-content fl yichu" wx:else>{{ item.lastContent }}</view>
                     <view class="msg-last-content-date fr yichu">{{ item.lastContentDate }}</view>
                 </view>
             </view>

pages/msgModule/wechat2/wechat2.js

                         // 说明没有一条是messageType == 1 的
                         if (tempArr.length < 1) {
                             this.sendmsgApi("", 1);
-                        }else{
-                            if(tempArr[0].transactionId != businessCommunicationDemandId){
+                        } else {
+                            if (tempArr[0].transactionId != businessCommunicationDemandId) {
                                 this.sendmsgApi("", 1);
                             }
                         }
         }
     },
     // 图片预览
-    viewImg(e){
-        
+    viewImg(e) {
+        let url = e.currentTarget.dataset.url;
+        url += "?time=" + Date.now();
+        console.log(url)
+        wx.previewImage({
+            current: url, // 当前显示图片的http链接
+            urls: [url] // 需要预览的图片http链接列表
+        })
     },
 })
 

pages/msgModule/wechat2/wechat2.wxml

                             <image class='other-head-img' src='{{item.senderHeadPortrait}}'></image>
                             <view class='other-record-content-triangle'></view>
                             <view class='other-record-content'>
-                                {{item.content}}
+                                <text selectable="{{true}}">{{item.content}}</text>
                                 <view class="msg-isRead left">{{ item.isRead ? '已读' : '未读' }}</view>
                             </view>
                         </view>
                         </view>
                         <view class='own-record'>
                             <view class='own-record-content'>
-                                {{item.content}}
+                                <text selectable="{{true}}">{{item.content}}</text>
                                 <view class="msg-isRead right">
                                     {{ item.isRead ? '已读' : '未读' }}
                                 </view>
                             <image class='other-head-img' src='{{item.senderHeadPortrait}}'></image>
                             <view class='other-record-content-triangle'></view>
                             <view class='other-record-content'>
-                                <image class='content-img' src="{{ mangerUrl + item.content }}" data-url="{{ mangerUrl + item.message }}" bindtap="viewImg"></image>
+                                <image class='content-img' src="{{ mangerUrl + item.content }}" data-url="{{ mangerUrl + item.content }}" bindtap="viewImg" mode="widthFix"></image>
                                 <view class="msg-isRead left">{{ item.isRead ? '已读' : '未读' }}</view>
                             </view>
                         </view>
                         </view>
                         <view class='own-record'>
                             <view class='own-record-content'>
-                                <image class='content-img' src="{{ mangerUrl + item.content }}" data-url="{{ mangerUrl + item.message }}" bindtap="viewImg"></image>
+                                <image class='content-img' src="{{ mangerUrl + item.content }}" data-url="{{ mangerUrl + item.content }}" bindtap="viewImg" mode="widthFix"></image>
                                 <view class="msg-isRead right">
                                     {{ item.isRead ? '已读' : '未读' }}
                                 </view>
                         <image class='other-head-img' src='{{receivebaseInfo.avatar}}'></image>
                         <view class='other-record-content-triangle'></view>
                         <view class='other-record-content'>
-                            {{item.message}}
+                            <text selectable="{{true}}">{{item.message}}</text>
                             <view class="msg-isRead left">{{ item.isRead ? '已读' : '未读' }}</view>
                         </view>
                     </view>
                     </view>
                     <view class='own-record'>
                         <view class='own-record-content'>
-                            {{item.message}}
+                            <text selectable="{{true}}">{{item.message}}</text>
                             <view class="msg-isRead right">{{ item.isRead ? '已读' : '未读' }}</view>
                         </view>
                         <view class='own-record-content-triangle'></view>
                         <image class='other-head-img' src='{{receivebaseInfo.avatar}}'></image>
                         <view class='other-record-content-triangle'></view>
                         <view class='other-record-content'>
-                            <image class='content-img' src="{{ mangerUrl + item.message }}" data-url="{{ mangerUrl + item.message }}" bindtap="viewImg"></image>
+                            <image class='content-img' src="{{ mangerUrl + item.message }}" data-url="{{ mangerUrl + item.message }}" bindtap="viewImg" mode="widthFix"></image>
                             <view class="msg-isRead left">{{ item.isRead ? '已读' : '未读' }}</view>
                         </view>
                     </view>
                     </view>
                     <view class='own-record'>
                         <view class='own-record-content'>
-                            <image class='content-img' src="{{ mangerUrl + item.message }}" data-url="{{ mangerUrl + item.message }}" bindtap="viewImg"></image>
+                            <image class='content-img' src="{{ mangerUrl + item.message }}" data-url="{{ mangerUrl + item.message }}" bindtap="viewImg" mode="widthFix"></image>
                             <view class="msg-isRead right">{{ item.isRead ? '已读' : '未读' }}</view>
                         </view>
                         <view class='own-record-content-triangle'></view>

pages/msgModule/wechat2/wechat2.wxss

 .msg-isRead.right {
     left: -60rpx;
 }
-.content-img {
-    width: 450rpx;
-}